Videotex character set
The character sets used by Videotex are based, to greater or lesser extents, on ISO/IEC 2022. Three Data Syntax systems are defined by ITU T.101, corresponding to the Videotex systems of different countries.
Data Syntax 1[]
Data Syntax 1 is defined in Annex B of T.101:1994. It is based on the CAPTAIN system used in Japan. Its graphical sets include JIS X 0201 and JIS X 0208.
The following G-sets are available through ISO/IEC 2022-based designation escapes:[1]: AnxB.2.3
| Name | G-set escape type | F byte | ISO-IR for F byte |
|---|---|---|---|
| Primary Character set | Single byte 94-code | 0x4A (J) |
ISO-IR-14 (JIS X 0201 Roman) |
| Katakana Character set | Single byte 94-code | 0x49 (I) |
ISO-IR-13 (JIS X 0201 Kana) |
| Mosaic I set | Single byte 94-code | 0x33 (3) |
(Occupies private-use F byte; also registered as ISO-IR-137 with F byte 0x79)[2]
|
| Mosaic II set | Single byte 94-code | 0x63 (c) |
ISO-IR-71[3] |
| Display Control set | Single byte 96-code | 0x38 (8) |
(Occupies private-use F byte) |
| PDI set | Single byte 96-code | 0x57 (W) |
(F byte exceptionally reserved and not used in ISO-IR)[4] |
| MVI set | Single byte 96-code | 0x39 (9) |
(Occupies private-use F byte) |
| Kanji set | Multiple byte 94n-code | 0x42 (B) |
ISO-IR-87 (JIS X 0208:1983) |
| Macro set | Single byte DRCS 96-code | 0x40 (@) |
(Uses a DRCS escape syntax) |
| DRCS I set | Single byte DRCS 94-code | 0x41 (A) |
(Is a DRCS) |
| DRCS II set | Multiple byte DRCS 94n-code | 0x40 (@) |
(Is a DRCS) |
Mosaic sets for Data Syntax 1[]
The mosaic sets supply characters for use in semigraphics.
| Videotex Mosaic set: First Mosaic set for Data Syntax 1 (partial Unicode mapping)[2] | ||||||||||||||||
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | |
| 0x | ||||||||||||||||
| 1x | ||||||||||||||||
| 2x | ▖ | � | � | ▟ | � | � | � | � | � | � | � |
| ||||